A jury convicted the defendant of being an accessory to the crime of criminal mischief in the second degree in violation of General Statutes § 53a-8 and § 53a-116. From the judgment rendered, the defendant has appealed, claiming that the trial court erred by (1) allowing the defendant to be represented by out-of-state counsel without first complying with Practice Book § 24; (2) denying the defendant effective assistance of counsel; (3) permitting the state to file a substitute information without allowing the defendant to move for a bill of particulars or granting the defendant a reasonable continuance; (4) failing to charge the jury properly on the elements of intent essential to convict the defendant as an accessory; (5) refusing to grant the defendant’s motions for a mistrial and a new trial on the basis of a juror’s non disclosure of information on voir dire; and (6) denying the defendant’s motion to voir dire the jury after its verdict.
The jury could readily have found the following facts: Between 6 p.m. on the evening of October 31, 1979, and 6 a.m. the following morning, vandals used spray paint to deface the Levonius premises located on Packer Road in Canterbury. Several days later, the police received an anonymous phone call which prompted them to question Lance Delpriore, Joel Brown and Robert Plante about the incident. Confessions by Delpriore and Brown involved Plante in the incident, and the trio were arrested. The three subsequently implicated the defendant as having paid them to spray paint the Levonius house, garage and driveway. The defendant was ultimately charged with conspiracy to commit criminal mischief in the second degree in violation of General Statutes §§ 53a-48 and 53a-116. With the permission of the court, *303 Stephen Nugent, a Rhode Island attorney, represented the defendant at trial, which began on March 12, 1980.
I
The defendant first claims that the trial court erred when, without complying with § 24 of the Practice Book, it permitted an out-of-state attorney to practice law in Connecticut. Section 24 affords the court discretion to allow an out-of-state attorney to practice in Connecticut “for good cause shown upon written application presented by a member of the bar of this state . . . .” The transcript does not disclose that when permission to represent the defendant was granted the Rhode Island counsel, either “good cause” was shown or a “written application presented” to the trial court. Nevertheless, the defendant himself moved for Attorney Nugent’s admission to represent him at trial.
1
Therefore, any result which ensued was induced by the defendant, and an action induced by the defendant cannot be made a ground of error.
State
v.
Cobbs,
II
The sixth amendment to the federal constitution guarantees that “the accused shall enjoy the right ... to have the assistance of counsel for his defense” in all criminal proceedings. Article first, § 8 of our state constitution mandates that “[i]n all criminal prosecutions, the accused shall have a right to be heard by himself and by counsel . . . .” This constitutionally guaranteed right to counsel embodies
*304
the right to the conscientious services of counsel whose performance is reasonably competent, or within the range of competence displayed by lawyers with ordinary training and skill in the criminal law.
State
v.
Clark,
A
The defendant contends that he was deprived of effective assistance of counsel because his attorney failed to file any pretrial motions. Specifically, he avers that his attorney should have filed a motion to dismiss the information to test the legal sufficiency of the affidavit that formed the basis of his arrest warrant.
Nothing in the record before us indicates that the defendant’s attorney failed to represent his client adequately in this respect. The affidavit supporting the arrest warrant was based upon the admissions of two active participants and the observations of a police officer who was at the scene. Thus, although the supporting affidavit was in part based on hearsay, the judicial officer who issued the arrest warrant had been apprised of the underlying circumstances upon which the informants had relied when providing information to the affiant.
Aguilar
v.
Texas,
Moreover, the issuing officer had before him sufficient information to credit the informants’ statements
*305
as reliable. The affidavit contained far more than the mere recital of conclusions. From it a judicial officer could deduce substantial corroboration of the informants’ statements. Corroboration exists where information from various sources coincides.
State
v.
Jackson,
B
The defendant contends that he was denied effective assistance of counsel because his attorney failed to request the court to instruct the jury that an adverse inference might be drawn from the state’s failure to produce Robert Plante, an alleged principal in the crime. At the time of trial, Plante was serving as a member of the United States Air Force and was stationed in Texas.
The mere failure to produce a particular person is insufficient to raise an adverse inference. An inference, in this circumstance, is appropriately drawn where (1) it would otherwise have been natural for a party to produce a particular person and (2) the particular witness is available.
State
v.
Brown,
A party claiming the benefit of an adverse inference must prove his entitlement to it.
State
v.
Olds,
*307 c
The defendant avers that because his counsel failed to preserve the record for appeal, he was deprived of effective assistance of counsel. The record indicates that counsel took exceptions to adverse rulings made by the trial court during his cross-examination of certain state’s witnesses. To preserve the record for appellate review, Practice Book § 288 requires only that “counsel shall state the grounds upon which [his objection] ... is made, succinctly and in such form as he desires it to go upon the record .... An exception to the ruling must be taken in order to make it a ground of appeal.” The defendant’s attorney adequately preserved his ground for appeal by timely excepting to the court’s rulings.
The defendant further claims that his attorney erred by failing to request the court reporter to record final arguments. To prevail on this claim, the defendant must prove that his counsel’s conduct fell below the range of competence displayed by lawyers with ordinary training and skill and that this lack of competence contributed to his conviction.
Siemon
v.
Stoughton,
To prove incompetent representation by counsel, the defendant must meet a stringent standard. If counsel’s representation is so horribly inept as to constitute a breach of his legal duty faithfully to represent his client’s interest, there has been a deprivation of the fundamental fairness essential to due process. In assessing the competency of trial counsel, how ever, we must avoid using hindsight, for in almost any case, a hindsight perusal of the record discloses any number of alternative trial tactics.
Palmer
v.
Adams,
Ill
The defendant next contends that the trial court erred by allowing the state to amend the charge against the defendant and by requiring him to come to trial without affording him the opportunity to move for a bill of particulars or allowing him a continuance to prepare a defense to the new charge. Although the defendant originally pleaded not guilty to the charge of a conspiracy to commit criminal mischief in the second degree, on the day the trial commenced, the court allowed the state to file a substitute information charging the defendant with being an accessory to the crime of criminal mischief in the second degree. The court overruled the defendant’s objection to the substituted information and denied the defendant’s request both for permission to file a motion for a bill of particulars and for a continuance to prepare a defense to the new charge.
As embodied in General Statutes § 53a-48, the offense of conspiracy requires proof of both an unlawful combination and an act done pursuant thereto. It is unnecessary to prove either the existence of a formal agreement or the accomplishment of an established purpose. Conspiracy occurs when two or more individuals knowingly engage in a mutual plan to do a forbidden act.
State
v.
Holmes,
Practice Book § 626 affords the court discretion to grant a continuance reasonably necessitated by an amended information. Whether the refusal to grant a continuance is so arbitrary as to violate the due process rights of the movant depends upon the circumstances present in each case and the reasons presented to the trial judge when the request was denied.
State
v.
Olds,
A motion for a bill of particulars is also addressed to the sound discretion of the court. An abuse in the exercise of this discretion can be premised only upon a clear and specific showing of prejudice to the defense.
State
v.
Brown,
IV
The defendant contends that the trial court erred in its instructions to the jury on the elements of intent necessary for conviction as an accessory. Citing
Sandstrom
v.
Montana,
The defendant also contends that the charge given was legally inadequate because it did not sufficiently guide the jury as to what intent was necessary to support a finding of guilty. The accessory statute requires two types of intent. The accessory must intend (1) to aid the principal and (2) to commit the offense with which he is charged.
State
v.
Harrison,
supra, 694. In evaluating a charge, we must look at the instruction as a whole, and not sever one portion to analyze it in isolation.
State
v.
Truppi,
V
The defendant further claims that the trial court erred by refusing to grant a mistrial when, during the course of the jury’s deliberation, the defendant became aware that a juror had been involved in a prior criminal matter, but had not disclosed the prior involvement on voir dire. Specifically, the juror’s daughter had been a homicide victim, and the defendant in the homicide proceeding had been discharged from prosecution because his confession had been suppressed.
The court has discharged a jury and directed a new trial where it has discovered juror bias during the course of trial.
State
v.
Roy,
Furthermore, it is equally possible that, rather than being vindictive against an accused, a father could be embittered against the state for failing to convict one accused of murdering his daughter. The defendant has not, however, elevated this possibility to fact. The court has wide discretion in passing on motions for mistrial.
State
v.
Savage,
VI
Finally, the defendant claims that the trial court erred in denying him the right to voir dire the jury after it rendered a verdict. The court may accept testimony from jurors concerning the existence of an extraneous influence, but it may not receive evidence as to the effect this influence may have had on the deliberations or on the mental process of any one juror or group of jurors.
Aillon
v.
State,
There is no error.
In this opinion Shea and Bieluch, Js., concurred.
Notes
Moreover, the transcript indicates that although a Danielson public defender, Attorney Ramon J. Canning, was available to sit at the defense counsel’s table, the defendant apparently did not seek Attorney Canning’s assistance.
General Statutes § 54-22 (c) (now § 54-82Í [c]) provides: “If a person in any state, which by its laws has made provision for commanding persons within its borders to attend and testify in criminal prosecutions ... in this state, ... a judge of such court may issue a certificate . . . [which] may include a recommendation that the witness be taken into immediate custody and delivered to an officer of this state . . . .” The Texas legislature has, by statute, authorized its judges to deliver to a sister state a person who is a material witness and whose presence is required in that state. Tex. Code Crim. Proc. Ann. art. 24.28 (Vernon 1981).
